Vinegar Syndrome: Dear Dead Delilah (1972 / Blu-ray+DVD)

Back in 1943, Luddy viciously murdered her mother with an axe. 30 years later and freshly released from the state mental hospital, deemed ‘cured’ of her violent impulses, Luddy’s luck seems to be turning around, thanks to a chance encounter with the family of Delilah (Agnes Moorehead), the miserly matriarch of a large plantation estate. She quickly finds herself hired as Delilah’s housekeeper, but no sooner than her arrival at the cavernous and secluded mansion, grisly murders begin to take place. And worse, each time a new corpse is discovered, Luddy finds she is unable to recall her whereabouts at the time of the bloodshed. Could her old self be coming out, or is someone else trying to set her up for more sinister motives?